4 ms·
Linux will not let you send a signal to init that it has not installed a signal handler for (to avoid unexpected terminate-by-default signals wrecking your mach
by aaronmdjones 7y ago
Linux will not let you send a signal to init that it has not installed a signal handler for (to avoid unexpected terminate-by-default signals wrecking your machine), and no process can install a signal handler for SIGKILL; ergo, you cannot SIGKILL init.
Other operating systems may vary, of course.